Pontiac 1993 Grand Am Owner's Manual page 164

Hitches
It's important to have the correct hitch
equipment. Crosswinds, large trucks
going by, and rough roads are a few
reasons why you'll need the right hitch.
Here are some rules to follow:
Will you have to make any holes in the
body of your vehicle when you install
a trailer hitch? If you do, then be sure
to seal the holes later when you remove
the hitch. If you don't seal them, deadly
carbon monoxide (CO) from your
exhaust can get into your vehicle. (See
the Index under Carbon Monoxide in
Exhaust.) Dirt and water can, too.
The bumpers on your vehicle are not
intended for hitches. Do not attach
rental hitches or other bumper-type
hitches to them.
Safety Chains
You should always attach chains
between your vehicle and your trailer.
Cross the safety chains under the tongue
of the trailer so that the tongue will not
drop to the road if it becomes separated
from the hitch. Instructions about safety
chains may be provided by the hitch
manufacturer or by the trailer
manufacturer. Follow the manufacturer's
recommendation for attaching safety
chains. Always leave just enough slack
so you can turn with your rig. And, never
allow safety chains to drag on the ground.
Trailer Brakes
Does your trailer have its own brakes?
Be sure to read and follow the
instructions for the trailer brakes so
you'll be able to install, adjust and
maintain them properly. And because
you have anti-lock brakes, do not try to
tap into your vehicle's brake system. If
you do, both brake systems won't work
well, or at all.
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